Mercury Sable 2000 Owner's Manual page 232

Filling station information
1
Use Ford Premium Engine Coolant (green in color). DO NOT USE Ford
Extended Life Engine Coolant (orange in color). Refer to Adding engine
coolant, in the Maintenance and Care chapter.
2
Ensure the correct automatic transmission fluid is used. Transmission
fluid requirements are indicated on the dipstick or on the dipstick
handle. MERCON and MERCON V are not interchangeable. DO NOT
mix MERCON and MERCON V. Refer to your Scheduled Maintenance
Guide to determine the correct service interval.
232